Book case



FIG. 1 is a right front perspective view of a bookcase showing my new design;

FIG. 2 is a left side view thereof, the right side being a mirror image; and,

FIG. 3 is a partial bottom view thereof.

The top, rear and partial bottom sides are plain and unornamented. The broken line disclosure is for illustrative purposes only and forms no part of the claimed design.

Views that are merely plain and/or do not include any ornamentality are not illustrated in the drawing disclosure. 

The ornamental design for a book case, as shown and described. 